Bosch +4 Platinum Spark Plugs Question

[300exwoodsracer]

I have a 300ex and not that I have a problem with the stock NGK plugs, but I would really like to get the Bosch +4 plugs for it... I know you guys say a lot how nothing makes any difference with plugs, but i got these for my 6wheeler a while back and it made cold starts much better etc. and would love them in my quad... SO i was just wondering if any of yall had put them in your 300ex before, cuz they are very hard to cross-reference... basically to get them for my 6wheeler i had to just go through and visually match them up... but other 6wheeler users told me they had found the right number the same way, and we all used the same one, so if any of yall can give any help here i'd appreciate it

[y2k400ex]

I dont know about bosch plugs, but split fire makes a triple platinum plug for the 400ex. From racing go-karts back in the day they do make a diffrence :D I put one in my 400ex and it does make a difernce:devil I have to order it directly from split fire, I tryed the local auto parts stores to see if they could order them but they couldn't. Here a link and the part numbers

TP416C

http://www.splitfire.com/triple.htm

http://www.247autoparts.com/store/sparkplug.html